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root/OpenMD/trunk/src/parallel/ForceMatrixDecomposition.cpp
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Comparing branches/development/src/parallel/ForceMatrixDecomposition.cpp (file contents):
Revision 1613 by gezelter, Thu Aug 18 20:18:19 2011 UTC vs.
Revision 1706 by gezelter, Fri Apr 27 20:44:16 2012 UTC

# Line 36 | Line 36
36   * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).            
37   * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
38   * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
39 < * [4]  Vardeman & Gezelter, in progress (2009).                        
39 > * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
40 > * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41   */
42   #include "parallel/ForceMatrixDecomposition.hpp"
43   #include "math/SquareMatrix3.hpp"
# Line 247 | Line 248 | namespace OpenMD {
248        for (int j = 0; j < nLocal_; j++) {
249          int jglob = AtomLocalToGlobal[j];
250  
251 <        if (excludes->hasPair(iglob, jglob))          
251 >        if (excludes->hasPair(iglob, jglob))
252            excludesForAtom[i].push_back(j);              
253          
253 –        
254          if (oneTwo->hasPair(iglob, jglob)) {
255            toposForAtom[i].push_back(j);
256            topoDist[i].push_back(1);
# Line 537 | Line 537 | namespace OpenMD {
537        fill(snap_->atomData.density.begin(),
538             snap_->atomData.density.end(), 0.0);
539      }
540 +
541      if (storageLayout_ & DataStorage::dslFunctional) {
542        fill(snap_->atomData.functional.begin(),
543             snap_->atomData.functional.end(), 0.0);
544      }
545 +
546      if (storageLayout_ & DataStorage::dslFunctionalDerivative) {      
547        fill(snap_->atomData.functionalDerivative.begin(),
548             snap_->atomData.functionalDerivative.end(), 0.0);
549      }
550 +
551      if (storageLayout_ & DataStorage::dslSkippedCharge) {      
552        fill(snap_->atomData.skippedCharge.begin(),
553             snap_->atomData.skippedCharge.end(), 0.0);
554      }
552 –    
555    }
556  
557  
# Line 836 | Line 838 | namespace OpenMD {
838     */
839    bool ForceMatrixDecomposition::skipAtomPair(int atom1, int atom2) {
840      int unique_id_1, unique_id_2;
841 <    
841 >        
842   #ifdef IS_MPI
843      // in MPI, we have to look up the unique IDs for each atom
844      unique_id_1 = AtomRowToGlobal[atom1];
845      unique_id_2 = AtomColToGlobal[atom2];
846 + #else
847 +    unique_id_1 = AtomLocalToGlobal[atom1];
848 +    unique_id_2 = AtomLocalToGlobal[atom2];
849 + #endif  
850  
845 –    // this situation should only arise in MPI simulations
851      if (unique_id_1 == unique_id_2) return true;
852 <    
852 >
853 > #ifdef IS_MPI
854      // this prevents us from doing the pair on multiple processors
855      if (unique_id_1 < unique_id_2) {
856        if ((unique_id_1 + unique_id_2) % 2 == 0) return true;
857      } else {
858 <      if ((unique_id_1 + unique_id_2) % 2 == 1) return true;
858 >      if ((unique_id_1 + unique_id_2) % 2 == 1) return true;
859      }
860   #endif
861 +    
862      return false;
863    }
864  
# Line 871 | Line 878 | namespace OpenMD {
878      
879      for (vector<int>::iterator i = excludesForAtom[atom1].begin();
880           i != excludesForAtom[atom1].end(); ++i) {
881 <      if ( (*i) == atom2 )  return true;
881 >      if ( (*i) == atom2 ) return true;
882      }
883  
884      return false;
# Line 946 | Line 953 | namespace OpenMD {
953      }
954  
955   #else
956 +    
957  
958 +    // cerr << "atoms = " << atom1 << " " << atom2 << "\n";
959 +    // cerr << "pos1 = " << snap_->atomData.position[atom1] << "\n";
960 +    // cerr << "pos2 = " << snap_->atomData.position[atom2] << "\n";
961 +
962      idat.atypes = make_pair( atypesLocal[atom1], atypesLocal[atom2]);
963      //idat.atypes = make_pair( ff_->getAtomType(idents[atom1]),
964      //                         ff_->getAtomType(idents[atom2]) );
# Line 996 | Line 1008 | namespace OpenMD {
1008    
1009    void ForceMatrixDecomposition::unpackInteractionData(InteractionData &idat, int atom1, int atom2) {    
1010   #ifdef IS_MPI
1011 <    pot_row[atom1] += 0.5 *  *(idat.pot);
1012 <    pot_col[atom2] += 0.5 *  *(idat.pot);
1011 >    pot_row[atom1] += RealType(0.5) *  *(idat.pot);
1012 >    pot_col[atom2] += RealType(0.5) *  *(idat.pot);
1013  
1014      atomRowData.force[atom1] += *(idat.f1);
1015      atomColData.force[atom2] -= *(idat.f1);
# Line 1190 | Line 1202 | namespace OpenMD {
1202                  }
1203                }
1204   #else
1193 –              
1205                for (vector<int>::iterator j1 = cellList_[m1].begin();
1206                     j1 != cellList_[m1].end(); ++j1) {
1207                  for (vector<int>::iterator j2 = cellList_[m2].begin();
1208                       j2 != cellList_[m2].end(); ++j2) {
1209 <                  
1209 >    
1210                    // Always do this if we're in different cells or if
1211 <                  // we're in the same cell and the global index of the
1212 <                  // j2 cutoff group is less than the j1 cutoff group
1213 <                  
1214 <                  if (m2 != m1 || (*j2) < (*j1)) {
1211 >                  // we're in the same cell and the global index of
1212 >                  // the j2 cutoff group is greater than or equal to
1213 >                  // the j1 cutoff group.  Note that Rappaport's code
1214 >                  // has a "less than" conditional here, but that
1215 >                  // deals with atom-by-atom computation.  OpenMD
1216 >                  // allows atoms within a single cutoff group to
1217 >                  // interact with each other.
1218 >
1219 >
1220 >
1221 >                  if (m2 != m1 || (*j2) >= (*j1) ) {
1222 >
1223                      dr = snap_->cgData.position[(*j2)] - snap_->cgData.position[(*j1)];
1224                      snap_->wrapVector(dr);
1225                      cuts = getGroupCutoffs( (*j1), (*j2) );
# Line 1219 | Line 1238 | namespace OpenMD {
1238        // branch to do all cutoff group pairs
1239   #ifdef IS_MPI
1240        for (int j1 = 0; j1 < nGroupsInRow_; j1++) {
1241 <        for (int j2 = 0; j2 < nGroupsInCol_; j2++) {      
1241 >        for (int j2 = 0; j2 < nGroupsInCol_; j2++) {    
1242            dr = cgColData.position[j2] - cgRowData.position[j1];
1243            snap_->wrapVector(dr);
1244            cuts = getGroupCutoffs( j1, j2 );
# Line 1227 | Line 1246 | namespace OpenMD {
1246              neighborList.push_back(make_pair(j1, j2));
1247            }
1248          }
1249 <      }
1249 >      }      
1250   #else
1251 <      for (int j1 = 0; j1 < nGroups_ - 1; j1++) {
1252 <        for (int j2 = j1 + 1; j2 < nGroups_; j2++) {
1251 >      // include all groups here.
1252 >      for (int j1 = 0; j1 < nGroups_; j1++) {
1253 >        // include self group interactions j2 == j1
1254 >        for (int j2 = j1; j2 < nGroups_; j2++) {
1255            dr = snap_->cgData.position[j2] - snap_->cgData.position[j1];
1256            snap_->wrapVector(dr);
1257            cuts = getGroupCutoffs( j1, j2 );
1258            if (dr.lengthSquare() < cuts.third) {
1259              neighborList.push_back(make_pair(j1, j2));
1260            }
1261 <        }
1262 <      }        
1261 >        }    
1262 >      }
1263   #endif
1264      }
1265        

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